public override bool DataGridViewColumnHeaderCellDrawBorder (DataGridViewColumnHeaderCell cell, Graphics g, Rectangle bounds)
{
if (!RenderClientAreas ||
!cell.DataGridView.EnableHeadersVisualStyles ||
cell is DataGridViewTopLeftHeaderCell ||
!VisualStyleRenderer.IsElementDefined (VisualStyleElement.Header.Item.Normal))
return base.DataGridViewColumnHeaderCellDrawBorder (cell, g, bounds);
g.DrawLine (cell.GetBorderPen (), bounds.Left, bounds.Bottom - 1, bounds.Right - 1, bounds.Bottom - 1);
return true;
}
